A method for the simultaneous spectrophotometric determination of nickel, cobalt and copper based on theformation of their complexes with 2-(2-Thiazolylazo)-p-Cresol (TAC) in micellar media of Triton X-100 isproposed. The absorbance spectra were recorded in the range of 500 to 800 nm. The linear concentrationrange for nickel, cobalt and copper in solution calibration sets were 0.05–1.80, 0.10–6...

The ferrochrome alloy is produced by electric arc melting of the mineral chromite (FeCr2O4). It is largely used for the production of stainless steels. Increasing the amount of chromium content in the steel allows for increased corrosion and oxidation resistance. Other alloying elements, such as nickel (Ni) or molybdenum (Mo), aid in making the steel more passive and increasing its stainless pr...

Approach • Develop a methodology that provides high-throughput fabrication and analyses of novel alloy materials of arbitrary composition. • Evaluate multi-component alloys consisting of platinum, ruthenium, nickel and zirconium that are corrosion-resistant in acid for catalytic activity. • Analyze results of polarization studies to develop a rationale for catalyst performance. • Evaluate promi...

Raney nickel catalyst alone removes sulfur in reasonable yield from organic sulfur compounds, such as thiols, thioethers, disulfides, hemithioacetals, hemithioketals, diketals, thioamides, thiolesters, thiophenes, thioazoles, sulfoxides, sulfones, isothiocyanates, thioureas, and also organoselenium and tellurium compounds. This desulfurization reaction, therefore, has been used for the solution...

This paper describes a novel microgripper, fabricated in superelastic alloy (Ni50.8Ti49.2) by wired micro Electro Discharge Machining (μEDM). The main features of the new microgripper are fabrication technology (μEDM) and exploited material (superelastic alloy); the gripper was sensorized with commercial semiconductor strain-gauges and implemented in the force-feedback micromanipulation worksta...

Korrosionsprobleme traten an den Kesselwän­ den von Wirbelschichtkesseln auf, in denen 100 % Altholz unter „Low-NOx­Verhältnissen“ verbrannt wurde. In einem ersten Schritt zum Verständnis der Auswirkungen des Brennstoffs wurden Ablagerungen an verschiedenen Positi­ onen der unteren Kesselwände gesammelt und analysiert. Ein großer Teil dieser Kesselwände war mit der Nickel-Basis-Legierung Alloy ...

Objective: To evaluate marginal discrepancies between cast implant superstructure and EDM processed implant structure. Materials and methods: For the purpose of this study, an experimental model was prepared on which nine cast implant superstructure in nickel-chromium were fabricated which was then subjected to EDM processing. One-screw test was used to verify fit of superstructure both preand ...

introduction: preserving the apical root structure during cleaning and shaping of the canal has always been a challenge in endodontics particularly when the root canals are curved. the purpose of this in vitro study was to compare the apical transportation induced by the reciproc and biorace rotary systems in preparing the mesiobuccal root canal of the human maxillary molars. materials and meth...

The effect of Ni impurity on the self-diffusivity of bSn in the (1 0 1) symmetric tilt grain boundary is investigated. Using molecular dynamics simulations over a temperature range of 300–450 K. It is shown that Ni solute decreases the grain boundary self-diffusivity of bSn as the amount of solute in grain boundary increases. We also study the solute effect on the diffusive width of grain bound...

The Fe-Ni-Sb-B amorphous alloy has been prepared by a solid-solid chemical reaction of ferric trichloride, nickel chloride, antimony chloride and potassium borohydride powders at room temperature. The inductive couple plasma study indicates that the resultant is composed of Fe 5.38 %, Ni 56.19 %, Sb 29.02 % and B 0.44 %. The XRD and thermal analysis show that the alloy is a non-strict sense amo...